- (a) Seating Areas. Seating areas on mounting rings or their equivalent shall be free of any burrs or projections that might cause unit breakage or improper seating for a distance of at least 32 mm (1.25 in.) on each side of the center of the locating notch.
- (b) Retaining rings or similar devices for holding a unit in a housing shall provide rigid retention of a unit of minimum design flange thickness.
Housing for sealed and semisealed optical units shall have mounting surfaces and retaining rings meeting the following requirements:
Note: Authority cited: Section 26103, Vehicle Code. Reference: Sections 24012 and 26103, Vehicle Code.